dmypy run stuck with previous module names

Using mypy 0.760
I have imp.py

class A:
        pass

and main.py

from imp import *

a=A()

If I run dmypy run -- --follow-imports=skip main.py it will correctly fail because it's not able to import imp.py
But if then I do dmypy run -- --follow-imports=skip . after checking only main.py it will incorrectly fail

dmypy run -- --follow-imports=skip .      
main.py:3: error: Name 'A' is not defined

If I change imp.py or restart the daemon, the error disappears (a cache issue?)

thanks!

Reproduce the sequence with imp.py and main.py: first run dmypy with --follow-imports=skip on main.py, then run it on ., and compare the diagnostics with a fresh daemon or after changing imp.py. Start at the dmypy daemon and its cache/state handling. Done means the second run no longer retains the stale Name 'A' is not defined error.